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Brain Lesions in Mallard Ducklings from Parents Fed Methylmercury

G. H. Heinz and L. N. Locke
Avian Diseases
Vol. 20, No. 1 (Jan. - Mar., 1976), pp. 9-17
DOI: 10.2307/1589469
Stable URL: http://www.jstor.org/stable/1589469
Page Count: 9
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Brain Lesions in Mallard Ducklings from Parents Fed Methylmercury
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Abstract

Methylmercury dicyandiamide was fed to mallard ducks at 3 ppm mercury. Mercury accumulated in the eggs to an average of 7.18 and 5.46 ppm on a wet-weight basis in 2 successive years. Mercury in the eggs is believed to have caused brain lesions in the hatched ducklings. Lesions included demyelination, neuron shrinkage, necrosis, and hemorrhage in the meninges overlying the cerebellum. Brains of dead ducklings contained an average of 6.17 and 5.19 ppm mercury on a wet-weight basis in 2 successive years.

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